Hornbeck uses these lines to symbolize that a court room is like a battlefield. A battlefield has bullets flying through the air but in a courtroom, there are words of accusations in the air rather than bullets. It is the defendant and the plaintiff that are fighting the battle. They are both trying to protect the people they are fighting for. When he says that he is inspecting the battlefield before the battle, what he means is that he is looking for a good spot to report the trial before all the other reporters show up.